Dakota Gold Corp.

During the quarter ended December 31, 2025, no director or Section 16 officer of the Company adopted, modified orterminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K, except as described below.

On January 15, 2026, Jennifer Grafton, a director, adopted a Rule 10b5-1 trading arrangement intended to satisfy the affirmative defense of Rule 10b5-1(c) under the Exchange Act. Ms. Grafton’s trading arrangement provides for the sale of up to 15,511 shares of the Company’s common stock pursuant to a one-time market order on May 18, 2026. The trading arrangement has a term of one year from the effective date and will automatically terminate upon the earlier of (i) the sale of the maximum shares subject to the plan, (ii) twelve months from the effective date of the instructions without all of the securities having been sold, or (iii) the occurrence of certain other termination events specified in the plan.